Lecture On Perineal Anatomy: Urogenital & Anal Triangles, Perineal Pouches & Clinical Aspects | MBBS

Explore the complex anatomy of the human perineum with this in-depth lecture. This video provides a detailed examination of the urogenital and anal triangles, focusing on the layers of fascia, the boundaries and contents of the superficial and deep perineal pouches in both males and females, and important neurovascular structures. Clinical correlations, such as urethral rupture, are also discussed. Key topics covered in this lecture include: Introduction to the Perineum: Division into the urogenital and anal triangles [00:08]. Fascial Layers: Superficial fascia: Fatty layer (Camper's fascia) and membranous layer (Scarpa's fascia) [00:31]. Fascia of Colles: The membranous layer in the urogenital triangle [03:38]. Superficial Perineal Pouch: Revealed by dissecting Colles' fascia; a triangular space [04:12]. Boundaries detailed [39:21]. Contents in males and females listed (e.g., crura of penis/clitoris, bulb of penis/vestibule, associated muscles) [40:31]. Perineal Membrane (Inferior Fascia of Urogenital Diaphragm): Located superior to the superficial perineal pouch [05:48]. Structures piercing it: Posterior scrotal/labial nerves, muscular branches of the perineal nerve [14:42]. Note: Dorsal nerve of the penis/clitoris does not pierce the perineal membrane [16:02]. Deep Perineal Pouch: Space superior to the perineal membrane [06:39]. Boundaries explained [48:59]. Contents in males (e.g., membranous urethra, bulbourethral glands, deep transverse perineal muscles, sphincter urethrae) and females (e.g., proximal urethra, sphincter urethrae) detailed [50:11]. Newer concepts regarding its "closed" nature [54:34]. Neurovasculature: Pudendal nerve and internal pudendal vessels passing through the pudendal canal (Alcock's canal) [10:40]. Male Perineal Anatomy: Structure of the penis: Corpus spongiosum and paired corpora cavernosa [29:11]. Muscles: Ischiocavernosus (covering crura) and bulbospongiosus (covering bulb) [32:13]. Female Perineal Anatomy: Vestibule, urethral orifice, vaginal orifice [37:06]. Bulb of the vestibule. Greater vestibular glands (Bartholin's glands) and their lubricating function [38:09]. Urethra: Membranous urethra: Located within the deep perineal pouch; the narrowest and least distensible part [51:11]. Urethral sphincter mechanism in females (three layers of muscle) [52:14]. Clinical Correlation: Urethral rupture and the potential pathways for extravasation of urine into the superficial perineal pouch, scrotum, and anterior abdominal wall (deep to Scarpa's fascia) [42:12]. This lecture is essential for medical students, anatomy scholars, surgical residents (urology, gynecology, colorectal), and healthcare professionals seeking a detailed understanding of perineal anatomy. SANTINIKETAN MEDICAL COLLEGE & HOSPITAL Real Classroom Demonstration/Lecture On: ANATOMY by Dr. Abhijit Roy (MBBS Batch: 2024-25) Conducted on: 01-04-25